Question 560224
={{{6z+1+4x^2-3y^3+7x-8y^2+2x^2-x+5z-17}}} 
Combine like terms
={{{4x^2+2x^2-3y^3-8y^2+7x-x+6z+5z-17+1}}} 
={{{6x^2-3y^3-8y^2+6x+11z-16}}} 



Variables are x,y,z
constant is -16
Coefficients are 6,-3, -8, 6, and 11



Evaluate
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={{{6x^2-3y^3-8y^2+6x+11z-16}}} 
Put x= -2, y=-3 and z=-5
={{{6(-2)^2-3(-3)^3-8(-3)^2+6(-2)+11(-5)-16}}} 
={{{6(4)-3(-27)-8(9)-12-55-16}}} 
={{{24+81-72-12-55-16}}} 
={{{105-155}}}
={{{-50}}}